Suchergebnisse

BACKGROUND: Women of reproductive age can be exposed to endocrine-disrupting chemicals (EDCs) at work, and exposure to EDCs in pregnancy may affect fetal growth. OBJECTIVES: We assessed whether maternal occupational exposure to EDCs during pregnancy as classified by application of a job exposure matrix was associated with birth weight, term low birth weight (LBW), length of gestation, and preterm delivery. METHODS: Using individual participant data from 133,957 mother-child pairs in 13 European cohorts spanning births from 1994 through 2011, we linked maternal job titles with exposure to 10 EDC groups as assessed through a job exposure matrix. For each group, we combined the two levels of exposure categories (possible and probable) and compared birth outcomes with the unexposed group (exposure unlikely). We performed meta-analyses of cohort-specific estimates. RESULTS: Eleven percent of pregnant women were classified as exposed to EDCs at work during pregnancy, based on job title. Classification of exposure to one or more EDC group was associated with an increased risk of term LBW [odds ratio (OR) = 1.25; 95% CI: 1.04, 1.49], as were most specific EDC groups; this association was consistent across cohorts. Further, the risk increased with increasing number of EDC groups (OR = 2.11; 95% CI: 1.10, 4.06 for exposure to four or more EDC groups). There were few associations (p < 0.05) with the other outcomes; women holding job titles classified as exposed to bisphenol A or brominated flame retardants were at higher risk for longer length of gestation. CONCLUSION: Results from our large population-based birth cohort design indicate that employment during pregnancy in occupations classified as possibly or probably exposed to EDCs was associated with an increased risk of term LBW. ; This work was supported by the European Community's Seventh Framework Programme (grants FP7/2007-2013, 226285, 241604) as part of the Environmental Health Risks in European Birth Cohorts project (http://www.enrieco.org) and the Developing a Child Cohort Research Strategy for Europe project (http://www.chicosproject.eu); and by the Instituto de Salud Carlos III (grant CD12/00563). Funding per cohort: ABCD: This work was supported by the Netherlands Organization for Health Research and Development (grant 2100.0076). BAMSE: This work was supported by the Swedish Heart-Lung Foundation; Stockholm County Council; Swedish Research Council for Health, Working Life and Welfare; and the European Commission's Seventh Framework 29 Program: the Mechanisms of the Development of Allergy (grant 261357). DNBC: This work was supported by the Danish Epidemiology of Science Centre; Pharmacy Foundation; Egmont Foundation; March of Dimes Birth Defect Foundation; Agustinus Foundation; and the Health Foundation. Generation R: This work was supported by the Erasmus Medical Center Rotterdam; Netherlands Organization for Health Research and Development; European Commission Seventh Framework Programme; and the Contaminant Mixtures and Human Reproductive Health Project (grant 212502); V.J. received an additional grant from the Netherlands Organization for Health Research and Development (grant VIDI 016.136.361) and Consolidator Grant from the European Research Council (grant ERC-2014-CoG-648916). Generation XXI: This work was supported by the Programa Operacional de Saúde – Saúde XXI; Quadro Comunitário de Apoio III; Administração Regional de Saúde Norte (Regional Department of Ministry of Health); Portuguese Foundation for Science and Technology; Fundo Europeu de Desenvolvimento Regional, and the Calouste Gulbenkian Foundation. INMA_Granada: This work was supported by the Instituto de Salud Carlos III (grants G03/176, CB06/02/0041); Spanish Ministry of Health (grant FIS-07/0252); European Union Commission (grants QLK4-1999-01422, QLK4-2002-00603, FP7-ENV-212502); and the Consejería de Salud de la Junta de Andalucía (grant 183/07; 0675-2010). INMA_New: This work was supported by the European Union (grants FP7-ENV-2011, 282957, HEALTH.2010.2.4.5-1); Instituto de Salud Carlos III (grants G03/176, CB06/02/0041, FIS-FEDER 03/1615, 04/1509, 04/1112, 04/1931, 05/1079, 05/1052, 06/1213, 07/0314, 09/02647, 11/01007, 11/02591, CP11/00178, FIS-PI06/0867, FIS-PS09/00090); Conselleria de Sanitat Generalitat Valenciana; Spanish Ministry of Health (grants FIS-PI041436, FIS- PI081151, FIS-PI042018, FIS-PI09/02311); Generalitat de Catalunya (grants CIRIT1999SGR, 00241); Obre Social Cajastur; Universidad de Oviedo; Department of Health of the Basque Government (grants 2005111093, 2009111069); and the Provincial Government of Gipuzkoa (grants DFG06/004, DFG08/001). KANC: This work was supported by the European Commission (grant FP6-036224). MoBa: This work was supported by the Norwegian Ministry of Health; National Institutes of Health; National Institute of Environmental Health Sciences (grant N01-ES–85433); National Institute of Neurological Disorders and Stroke (grant 1 UO1 NS 047537); Norwegian Research Council; Functional Genomics (grant 151918/S10); and Environmental Exposures and Health Outcomes (grant 213148). NINFEA: This work was supported by the Compagnia San Paolo Foundation, and by the Piedmont Region. Pélagie: This work was supported by the National Institute of Health and Medical Research; the French Ministry of Health; the French Ministry of Labor; French Agency for Food, Environmental and Occupational Health and Safety; French National Research Agency; and the French Institute for Public Health Surveillance. REPRO_PL: This work was supported by the National Centre for Research and Development, Poland (grants PBZ-MEiN-/8/2/2006, K140/P01/2007/1.3.1.1); the Norwegian Financial Mechanism within the PolishNorwegian Research Fund (grant PNRF-218-AI-1/07); and European Community's Seventh Framework Programme (grant FP7/2007-2013, 603946). Rhea: This work was supported by the European Union Integrated Project NewGeneris, 6th Framework Programme, (grant FOOD-CT-2005-016320); and the Health Impacts of Long-term Exposure to Disinfection By-products in Drinking Water project (grant Food-CT-2006-036224).

Results from studies evaluating potential effects of prenatal exposure to radio-frequency electromagnetic fields from cell phones on birth outcomes have been inconsistent. Using data on 55,507 pregnant women and their children from Denmark (1996-2002), the Netherlands (2003-2004), Spain (2003-2008), and South Korea (2006-2011), we explored whether maternal cell-phone use was associated with pregnancy duration and fetal growth. On the basis of self-reported number of cell-phone calls per day, exposure was grouped as none, low (referent), intermediate, or high. We examined pregnancy duration (gestational age at birth, preterm/postterm birth), fetal growth (birth weight ratio, small/large size for gestational age), and birth weight variables (birth weight, low/high birth weight) and meta-analyzed cohort-specific estimates. The intermediate exposure group had a higher risk of giving birth at a lower gestational age (hazard ratio = 1.04, 95% confidence interval: 1.01, 1.07), and exposure-response relationships were found for shorter pregnancy duration (P < 0.001) and preterm birth (P = 0.003). We observed no association with fetal growth or birth weight. Maternal cell-phone use during pregnancy may be associated with shorter pregnancy duration and increased risk of preterm birth, but these results should be interpreted with caution, since they may reflect stress during pregnancy or other residual confounding rather than a direct effect of cell-phone exposure. ; The Generalized EMF Research Using Novel Methods (GERoNiMO) Project was supported by the European Union (grant 603794). The Amsterdam Born Children and Their Development Study (ABCD) was supported by the Netherlands Organization for Health Research and Development (grant 2100.0076) and the Electromagnetic Fields and Health Research program (grants 85600004 and 85800001). The Danish National Birth Cohort Study (DNBC) was supported by the Danish Epidemiology Science Centre, the Lundbeck Foundation (grant 195/04), the Egmont Foundation, the March of Dimes Birth Defect Foundation, the Augustinus Foundation, and the Medical Research Council (grant SSVF 0646). The Spanish Environment and Childhood Project (INMA) was supported by the European Union (grants FP7-ENV-2011, 282957, and HEALTH.2010.2.4.5-1); Instituto de Salud Carlos III (grants G03/176, CB06/02/0041, FIS-FEDER 03/1615, 04/1509, 04/1112, 04/1931, 05/1079, 05/1052, 06/1213, 07/0314, 09/02647, 11/01007, 11/02591, CP11/00178, FIS-PI06/0867, FIS-PS09/00090, FIS-PI041436, FIS-PI081151, FIS-PI042018, FIS-PI09/02311, FISPI13/1944, FIS-PI13/2429, FIS-PI14/0981, FIS-PI13/141687, CP13/00054 (including FEDER funds), and MS13/00054); the Conselleria de Sanitat Generalitat Valenciana; the Generalitat de Catalunya (grants CIRIT1999SGR and 00241); Obra Social Cajastur; the Universidad de Oviedo; the Department of Health of the Basque Government (grants 2005111093 and 2009111069); and the Provincial Government of Gipuzkoa (grants DFG06/004 and DFG08/001). The Korean Mothers and Children's Environment Health Study (MOCEH) was supported by the National Institute of Environmental Research, the Ministry of the Environment, and the Information and Communication Technology (ICT) research and development program of the Ministry of Science and ICT (grants 2017-0-00961 and 2019-0-00102), South Korea.

INTRODUCTION: Previous studies have reported associations between prenatal cell phone use and child behavioral problems, but findings have been inconsistent and based on retrospective assessment of cell phone use. This study aimed to assess this association in a multi-national analysis, using data from three cohorts with prospective data on prenatal cell phone use, together with previously published data from two cohorts with retrospectively collected cell phone use data. METHODS: We used individual participant data from 83,884 mother-child pairs in the five cohorts from Denmark (1996-2002), Korea (2006-2011), the Netherlands (2003-2004), Norway (2004-2008), and Spain (2003-2008). We categorized cell phone use into none, low, medium, and high, based on frequency of calls during pregnancy reported by the mothers. Child behavioral problems (reported by mothers using the Strengths and Difficulties Questionnaire or Child Behavior Checklist) were classified in the borderline/clinical and clinical ranges using validated cut-offs in children aged 5-7years. Cohort specific risk estimates were meta-analyzed. RESULTS: Overall, 38.8% of mothers, mostly from the Danish cohort, reported no cell phone use during pregnancy and these mothers were less likely to have a child with overall behavioral, hyperactivity/inattention or emotional problems. Evidence for a trend of increasing risk of child behavioral problems through the maternal cell phone use categories was observed for hyperactivity/inattention problems (OR for problems in the clinical range: 1.11, 95%CI 1.01, 1.22; 1.28, 95%CI 1.12, 1.48, among children of medium and high users, respectively). This association was fairly consistent across cohorts and between cohorts with retrospectively and prospectively collected cell phone use data. CONCLUSIONS: Maternal cell phone use during pregnancy may be associated with an increased risk for behavioral problems, particularly hyperactivity/inattention problems, in the offspring. The interpretation of these results is unclear as uncontrolled confounding may influence both maternal cell phone use and child behavioral problems. ; This work was supported by the European Union: GERoNiMO project (grant 603794) and grants FP7-ENV-2011, 282957, HEALTH.2010.2.4.5-1